test-drb

test-drb@ccmp.vtda.org

101090 discussions

Need to borrow Amiga 2000/3000 keyboard near Oakland, CA...

by COURYHOUSE＠aol.com

where do you get a thing like that to convert IBM keyboard for the Amiga's use? we have a Amiga with toaster we need a keyboard for, Prefer the real Amiga one but.... In a message dated 2/4/2017 7:21:14 P.M. US Mountain Standard Time, ian.finder at gmail.com writes: I ordered a PS/2 -> amiga adapter for the fine folks at the MADE in oakland: https://www.yelp.com/biz/the-museum-of-art-and-digital-entertainment-oakland But I fear it may not arrive in time for their 2/27 show. Is there anyone local who could loan these good folks an Amiga 2K or 3K keyboard? I'm remote and cannot do so. -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

9 years, 3 months

Need to borrow Amiga 2000/3000 keyboard near Oakland, CA...

by ian.finder＠gmail.com

I ordered a PS/2 -> amiga adapter for the fine folks at the MADE in oakland: https://www.yelp.com/biz/the-museum-of-art-and-digital-entertainment-oakland But I fear it may not arrive in time for their 2/27 show. Is there anyone local who could loan these good folks an Amiga 2K or 3K keyboard? I'm remote and cannot do so. -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

9 years, 3 months

Macintosh Floppy

by bill.gunshannon＠hotmail.com

Anybody interested in a Sony MP-F75W-21G? I have one to dispose of as I got rid of all my Mac stuff a long time ago. Make an offer. bill

9 years, 3 months

Logic Analysers

by jnc＠mercury.lcs.mit.edu

> From: Jon Elson > Any time you see really narrow glitches, especially when they are one > LA sample wide, you have no idea what they actually look like. The LA > detects that the pulse was there at the instant it sampled it, but you > don't know whether it was 5 ns wide, or 70 ns wide ... You also don't > know whether they were full-amplitude pulses or runts that just barely > crossed the logic threshold of the analyzer. Which is why I always prefer to work with an LA _and_ a 'scope: the 'scope lets me see what the signals look like, how much noise/etc there is, etc, etc, while the LA can do other things - better triggering, capture longer time periods, etc. (Now they have those fancy new digitial 'scope with capture capability, and you can get the best of both worlds with one box, but I guess they are still kind of pricy.) But you can probably pick up an old 'scope for not much money on eBait. I can't imagine working on anything without one. Noel

9 years, 3 months

Logic Analysers

by witchy＠binarydinosaurs.co.uk

Evening folks, I have two so-called Logic Analysers, both cheap Chinese clones of other more expensive units that hook up to the host via USB2 and stream readings direct to software, in one case the open source Sigrok and in the other genuine Saleae Logic. I'm getting different and inconsistent readings out of both of them whilst sampling at 25MHz which should be more than enough for this 6MHz Executel I'm working on. Both of them are good for spotting dead or stuck outputs but I still can't get a good set of readings from eg all points on a single address line. Tonight I replaced all four ROM sockets and ROM chips, tested each individual line for resistance (0.5 ohms on all apart from an occasional 0.4 and 0.6) but still get ghost readings. Is it me or the cheap clones? Whilst looking for better quality units I came across a couple of 'proper' HP/Agilent analysers, a 1663A 34 channel and 1661A 102 channel which seem complete apart from the chip leg grabbers. Am I right to assume some of you might have experience of these beasts? Forums seem to mostly think the streaming USB units aren't worth anything for more than a few channels but I'm still a relative beginner to all of this. I really need to watch all 16 lines of an address bus and externally clock it as Tony has suggested. Any insights appreciated! -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?

9 years, 3 months

One more VCF East tech class/teacher needed

by cctalk＠snarc.net

We have one last 60-minute spot to fill for the Friday (March 31) tech classes at VCF East. Any topic is fair game if it has wide appeal and makes people into better vintage computing hobbyists. The topics thus far are here: http://vcfed.org/wp/classes/. Email me ** off-list ** if you'd like to volunteer. (Please avoid "someone should teach XYZ" messages -- we know what * should * be taught, we need people to DO it. :) ________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)3 educational non-profit evan at vcfed.org (646) 546-9999 www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation

9 years, 3 months

RL02 version of UNIX6?

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > Another OS that would run on your machine (as well as an 11/20) would > be RSTS-11 (V4, or I suppose V3 if you can find that) I'd love to have an old RSTS-11, is there any variant around? > didn't use the MMU Huh? He's got an MMU (I think): it's the EIS he's currently struggling with. Noel

9 years, 3 months

[cctalk-request@classiccmp.org: confirm 38290c8a992491eda604beff5a06ff20cd7e85f5]

by ams＠gnu.org

Can someone please fix the mailing list software? This has been reported every once in a while by a bunch of people for over ten years. These are a just the last bounces I got: 20-Jan cctalk-request at classiccmp [78] confirm fd5d1f938a6c920c61c094802694d0194e87f1a4 25-Jan cctalk-request at classiccmp [78] confirm e01809296377d0fd3033b4ab27394ca7dc0fae71 31-Jan cctalk-request at classiccmp [78] confirm 38290c8a992491eda604beff5a06ff20cd7e85f5

9 years, 3 months

RL02 version of UNIX6?

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > I was able to get the extended three cables Excellent! > I can put the M7238 EIS card on a riser so I can probe for faults I'm all agog to hear what you find out! > and maybe if I am lucky boot XXDP+. With the EIN installed I can't boot I thought the machine basically just totally froze if you tried inserting the KE11-E, and removing the jumper to enable it? Oh well, that severe a fault should be fairly easy (sic) to track down. > From: Paul Koning > DEC's PDP11 architecture handbook doesn't appear to confirm that. > Either that or the model differences table is sloppy. The next page (B-4) says "The KE11-E .. provides MUL <etc>" and has an "x" under "35/40". Noel

9 years, 3 months

RL02 version of UNIX6?

by jnc＠mercury.lcs.mit.edu

> From: Allison > for laughs I wandered over to: > http://ftp.math.utah.edu/pub/mirrors/minnie.tuhs.org/PDP-11/Boot_Images/ > To see if the copy of V6 on RL02 is still there.... yep it is. and it > runs on a 11/23 just fine Yes, that's another copy of the Shoppa disk. So, I looked at that system, to see how it dealt with the clock issue on an 11/23 (in /sys/ken/main.c, if anyone else is interested). While looking, I noticed something that made it extremely unlikely that it would boot on an 11/40. Sure enough, attempting to boot the /unix on it on a (simulated) -11/40 blows out. There are a couple of other unix loads on that pack image (oldunix, unix.tmp, etc), but all the ones I looked at had the same issue (only tried booting the 'unix' one, though); they're probably all for the same machine, so have the same configuration issue. V6 Unix was pretty persnickety about the hardware configuration it ran on; while it was possible to create builds that would run on almost any configuration, on 'vanilla' V6 that really only applies to the /40/45/70 era. And even then you still had to re-build the system to match your actual hardware configuration, almost all the time. The advent of the /23 (with no CSW, and no KW11-L/P), made things more complicated. (The clock is pretty key - Unix needs one - several things, e.g. parts of the teletype drivers, require real-time delays provided by the clock. I've never tried to run Unix without a working clock, I'm not sure if it would run without slowly grinding to a halt as stuff waited for clocks delays that never happened.( With a little work, a suite of 'universal boot' versions (one for each type of disk controller - RK05/RL02/RX02 etc) could have been created that would boot and run on any pretty much CPU/etc configuration - at least, well enough to build one that did exactly match the hardware configuration at hand. (The one on the Shoppa disk is close, from what I could see.) I don't think anyone ever bothered, though (in part because it was much more of a PITA to test them all, BITD, with only real hardware). Noel

9 years, 3 months

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